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DSLET

DSLET structure

CAS No.: 75644-90-5

Chemical Name:: DSLET

Synonyms: DSLET;Dstle;Dislet;Lidocaine Impurity 59;DELTA-RECEPTOR PEPTIDE;2-Ser-Thr-Leu-enkephalin;TYR-D-SER-GLY-PHE-LEU-THR;M.W. 686.90 C33H46N6O10;(D-SER2)-LEU-ENKEPHALIN-THR;Enkephalin-Leu, Ser(2)-Thr-

CBNumber:: CB3103713

Molecular Formula:: C33H46N6O10

Molecular Weight:: 686.75

MDL Number:: MFCD00076707

MOL File:: 75644-90-5.mol

MSDS File:: SDS

TDS File:: TDS

Last updated:2026-05-11 19:39:08

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DSLET Properties

Boiling point	1163.021±65.00 °C(Press: 760.00 Torr)(predicted)
Density	1.319±0.06 g/cm3(Temp: 25 °C; Press: 760 Torr)(predicted)
storage temp.	-15°C
solubility	Soluble to 0.50 mg/ml in sterile water
form	Powder
pka	3.253±0.10(predicted)
Sequence	Tyr-L-Ser-Gly-Phe-Leu-Thr

DSLET price

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Usbiological	255200	DSLET Asreported	75644-90-5	1mg	$310	2026-06-03	Buy
Biosynth	FS108773	(D-Ser2)-Leu-Enkephalin-Thr	75644-90-5	2mg	$150	2026-06-04	Buy
Biosynth	FS108773	(D-Ser2)-Leu-Enkephalin-Thr	75644-90-5	5mg	$174.2	2026-06-04	Buy
ApexBio Technology	B5067	DSLET	75644-90-5	1mg	$71	2026-05-06	Buy
aablocks	AA00G2LP	L-Tyrosyl-D-serylglycyl-L-phenylalanyl-L-leucyl-L-threonine 98%	75644-90-5	1mg	$129	2026-05-28	Buy

Product number	Packaging	Price	Buy
255200	1mg	$310	Buy
FS108773	2mg	$150	Buy
FS108773	5mg	$174.2	Buy
B5067	1mg	$71	Buy
AA00G2LP	1mg	$129	Buy

DSLET Chemical Properties, Uses, Production

Uses

DSLET ([D-Ser2, Leu5, Thr6]-enkephalin) is a highly specific agonist of the δ-receptor. DSLET is an enkephalin-related peptide selectively bound to the δ opioid receptor[1][2].

Definition

ChEBI: DSLET is an oligopeptide.

IC 50

δ Opioid Receptor/DOR

References

[1] J L Nano, et al. Characterization of delta-opioid receptors and effect of enkephalins on IRD 98 rat epithelial intestinal cell line. Pflugers Arch. 2000 Mar;439(5):547-54. DOI:10.1007/s004249900160
[2] C S Goodchild, et al. Antinociception by intrathecal midazolam involves endogenous neurotransmitters acting at spinal cord delta opioid receptors. Br J Anaesth. 1996 Dec;77(6):758-63. DOI:10.1093/bja/77.6.758

DSLET synthesis

Synthesis of DSLET from L-Threonine, N-[N-[N-[N-[N-[N-[(1,1-dimethylethoxy)carbonyl]-L-tyrosyl]-O-(1,1-dimethylethyl)-D-seryl]glycyl]-L-phenylalanyl]-L-leucyl]-O-(1,1-dimethylethyl)- (9CI)

DSLET Preparation Products And Raw materials

Raw materials

Preparation Products

DSLET Suppliers

Global Suppliers ( 82)

Supplier	Tel	Email	Country	ProdList	Advantage
3B Pharmachem (Wuhan) International Co.,Ltd.	18930552037	3bsc@sina.com	China	15813	69
GL Biochem (Shanghai) Ltd	21-61263452 13641803416	ymbetter@glbiochem.com	China	9981	64
Shanghai Hanhong Scientific Co.,Ltd.	021-54306202 13764082696	info@hanhongsci.com	China	42917	64
Chemsky（shanghai）International Co.,Ltd.	021-50135380	shchemsky@sina.com	China	32273	50
Wuxi Zhongkun Biochemical Technology Co., Ltd.	0510-85629785 18013409632;	sales@reading-chemicals.com	China	15165	58
Shanghai YuanYe Biotechnology Co., Ltd.	15026964105	2881489226@qq.com	China	89667	60
Nanjing Leon Biological Technology Co., Ltd.	025-84523390 -127; 17705183659	sales@njleonbiotech.com	China	5501	55
Nanjing Peptide Biotech Ltd.	025-58361106-805 15951641583	zhao.xu@njpeptide.com	China	9976	55
Hubei Yangxin Medical Technology Co., Ltd.	15374522761	3003392093@yongstandards.com	China	9995	55
Chengdu Youngshe Chemical Co., Ltd.	+86-17380623303	Caroline@youngshechem.com	China	4726	58

Supplier	Advantage
3B Pharmachem (Wuhan) International Co.,Ltd.	69
GL Biochem (Shanghai) Ltd	64
Shanghai Hanhong Scientific Co.,Ltd.	64
Chemsky（shanghai）International Co.,Ltd.	50
Wuxi Zhongkun Biochemical Technology Co., Ltd.	58
Shanghai YuanYe Biotechnology Co., Ltd.	60
Nanjing Leon Biological Technology Co., Ltd.	55
Nanjing Peptide Biotech Ltd.	55
Hubei Yangxin Medical Technology Co., Ltd.	55
Chengdu Youngshe Chemical Co., Ltd.	58

View Latest Price from DSLET manufacturers

Image	Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
	2026-05-11	(D-Ser2)-Leu-Enkephalin-Thr	$68.00-229.00		94.17%	10g	TargetMol Chemicals Inc.

(D-Ser2)-Leu-Enkephalin-Thr
$68.00-229.00
94.17%
TargetMol Chemicals Inc.

DSLET Spectrum

DSLET(75644-90-5)MS

75644-90-5 (DSLET) Related Search:

(3,5-Diiodo-Tyr1)-dtlet [LEU5]-ENKEPHALIN DSLET ACETATE SALT DELTAKEPHALIN BUBU

DSTBULET DSLET

1of2

(D-SER2)-LEU-ENKEPHALIN-THR (D-SER2)-LEU-ENKEPHALIN-THR-OH DSLET DELTA-RECEPTOR PEPTIDE tyrosyl-seryl-glycyl-phenylalanyl-leucyl-threonine (D-ser2)-leucine enkephalin-thr acetate (D-SER2)-LEUCINE ENKEPHALIN-THR (D-serine2)leucine enkephalin threonine acetate [D-Ser2]-Leucine Enkephalin-Thr acetate salt DSLET, Tyr-D-Ser-Gly-Phe-Leu-Thr H-TYR-D-SER-GLY-PHE-LEU-THR-OH [D-SER2, LEU5]-ENKEPHALIN-THR M.W. 686.90 C33H46N6O10 [D-Ser2,Leu5,Thr5a]enkephalin [D-Ser2,Leu5,Thr6]enkephalin [D-Ser2,Thr6]leucine enkephalin L-Tyr-D-Ser-Gly-L-Phe-L-Leu-L-Thr-OH 2-Ser-Thr-Leu-enkephalin Dislet Dstle Enkephalin, Ser(2), Leu(5), Thr(6)- Enkephalin-Leu, Ser(2)-Thr- Enkephalin-Leu, seryl(2)-threonine- L-Threonine, L-tyrosyl-D-serylglycyl-L-phenylalanyl-L-leucyl- L-Threonine, N-(N-(N-(N-(N-L-tyrosyl-D-seryl)glycyl)-L-phenylalanyl)-L-leucyl)- TYR-D-SER-GLY-PHE-LEU-THR (D-Ser2)-Leu-Enkephalin-Thr H-Tyr-D-Ser-Gly-Phe-Leu-Thr-OH (DSer2)LeuEnkephalinThr,(D Ser2) Leu Enkephalin Thr,(D-Ser-2)-Leu-Enkephalin-Thr(75644-90-5 free base) (D-Ser?)-Leu-Enkephalin-Thr Lidocaine Impurity 59 75644-90-5 C33H46N6O10 Opioid receptor and opioid-like receptor